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Infertility in Males

Infertility in Males

Male infertility affects millions of couples worldwide, arising from various factors that impact different stages of the reproductive process. An endocrine imbalance resulting from conditions like hypogonadism, Klinefelter syndrome, or pituitary disorders can disrupt hormone levels and reduce sperm production. Testicular defects, such as tumors, cryptorchidism, atrophic testes, abnormal sperm morphology, and low sperm count or motility, may arise due to genetic factors, structural...

Spermatogenesis

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

Spermatogenesis

Spermatogenesis

Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...

Sperm Structure and Semen Composition

Sperm Structure and Semen Composition

During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...

Disorders of the Male Reproductive System

Disorders of the Male Reproductive System

Men's health issues are increasingly recognized as significant, with several conditions posing common threats. Among these, testicular cancer is especially prevalent in younger men, particularly those aged 20 to 35 years. The disease often manifests as a painless mass in the testicles, sometimes accompanied by a sensation of heaviness or a dull ache.
Prostate disorders are another major concern. These conditions can impair urinary flow due to the prostate's location around the urethra. Symptoms...

Sperm Transport

Sperm Transport

The journey of sperm from its origin to the point of ejaculation begins within the seminiferous tubules of the testis. Here, Sertoli cells produce fluid that propels non-motile sperm through a series of conduits, starting with the straight tubules leading to the rete testis. This interconnected network of tubules acts as the initial pathway for sperm, guiding them into the efferent ductules and then into the epididymis for maturation.
The maturation phase occurs in the epididymis, where sperm...

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Related Experiment Video

Updated: Jun 4, 2026

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

Published on: May 27, 2022

[Globozoospermia syndrome: an update].

Yan-wei Sha¹, Yue-qiang Song, Bin Han

¹Center of Reproductive Medicine, Xiamen Women and Children Health Care Hospital, Xiamen, Fujian 361003, China. shayanwei928@126.com

Zhonghua Nan Ke Xue = National Journal of Andrology

|March 1, 2011

Summary

This summary is machine-generated.

Globozoospermia syndrome, a rare sperm disorder, features round sperm heads and lacks acrosomes, significantly reducing fertilization ability. Assisted reproductive techniques are currently the only option for affected individuals to achieve reproduction.

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Vessel-Sparing Microsurgical Longitudinal Intussusception Vasoepididymostomy to Treat Epididymal Obstructive Azoospermia

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Published on: January 26, 2024

Area of Science:

Reproductive Medicine
Human Genetics
Andrology

Context:

Globozoospermia syndrome is a rare form of teratozoospermia, affecting less than 0.1% of the population.
Characterized by round sperm heads, absent acrosomes, and abnormal sperm morphology.
Acrosome absence impairs oocyte activation and fertilization.

Purpose:

To provide a comprehensive overview of globozoospermia syndrome.
To discuss its clinical manifestations, pathogenesis, and genetic underpinnings.
To evaluate the fertilizability and reproductive potential of affected individuals.

Summary:

This review details globozoospermia syndrome, a condition marked by specific sperm defects impacting fertility.
It covers the syndrome's clinical presentation, known genetic links (including mouse and human genes), and the challenges in natural conception.
The article highlights that assisted reproductive technologies are currently the sole option for procreation.

Impact:

Enhances understanding of a rare male infertility cause.
Informs clinical diagnosis and genetic counseling for globozoospermia.
Guides reproductive strategies for affected patients seeking to conceive.